Just like in the 2011-12 season, Dortmund and the Gunners are set to meet in the group stages of the Champions League.

However, unlike two years ago, the 2013 Champions League finalists are favourites to win the group, also including Napoli and Marseille.

The record-breaking €50 million transfer of Ozil from Real Madrid to Arsenal has sent shockwaves through Europe, but Klopp does not believe the Germany international's arrival will make life more difficult for his side when they face the Gunners.

However, Klopp was still full of praise for Arsenal’s transfer business and believes Madrid may have been forced to sell Ozil in order raise cash.

“That transfer is a winner. It doesn’t happen that often that €50 million is pushed over the counter on deadline day,” he said. “Mesut is a cracker. Nobody knows, why he was sold. Maybe Real needed money.”

When Klopp was questioned as to whether he would invest so much money into just one player, he replied: “A few years ago [with the signings of Tomas Rosicky, Jan Koller, Marcio Amoroso and others in the early 2000s] we spent unbelievable amounts of money. But what happens in England is crazy. I don’t know 80% of the players for which a total of €700 million was splashed out.”

Klopp also offered his thoughts on Gareth Bale’s €100 million transfer from Tottenham to Madrid.

“It is not important how expensive a player is. The question is: do you really want him and can you afford him?” Klopp said. “The fees are madness, but they stay in the football cycle. Real president Florentino Perez had set his mind on Bale and simply paid the €100 million. Perez also bought Hochtief [a German construction company] -- maybe, sometimes, he in the morning doesn’t know what he is to do with his money in the evening.”